94 lines
2.0 KiB
C#
94 lines
2.0 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using Godot;
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using System;
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namespace Rokojori
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{
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[Tool]
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[GlobalClass]
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public partial class QuadBillboardsFromMesh:QuadBillboardDataProcessor
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{
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[Export]
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public float density = 1;
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[Export]
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public MeshInstance3D source;
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[Export]
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public bool updateMesh = false;
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MeshGeometry _cached = null;
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public override List<QuadBillboardData> Process( List<QuadBillboardData> data )
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{
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if ( source == null || source.Mesh == null )
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{
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_cached = null;
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return data;
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}
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if ( _cached == null || updateMesh )
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{
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_cached = MeshGeometry.From( source );
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}
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var parent = GetParent<QuadBillboardMeshGenerator>();
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var tri = new Triangle3( Vector3.Zero, Vector3.One, Vector3.One * 2 );
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_cached.ForEachTriangle(
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( t, a, b, c )=>
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{
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var tri = Triangle3.CreateFrom( _cached, t );
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tri = tri.Shrink( density / 2f );
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if ( tri == null )
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{
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return;
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}
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var normal = tri.normal;
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var outline = tri.GetOutline();
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var length = outline.ComputeLength(-1);
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while ( outline != null && outline.ComputeLength(0) > density )
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{
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var numPoints = Mathf.Ceil( length / density );
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for ( int i = 0; i < numPoints; i++ )
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{
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var s = (float)i / ( numPoints );
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var p = outline.PositionAt( s );
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}
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tri = tri.Shrink( density );
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if ( tri == null )
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{
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outline =null;
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}
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else
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{
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outline = tri.GetOutline();
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}
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}
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}
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);
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var d = new QuadBillboardData();
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d.position = GlobalPosition - parent.GlobalPosition;
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d.rotation = this.GetGlobalQuaternion();
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d.scale = Scale;
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d.visible = true;
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data.Add( d );
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return data;
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}
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}
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} |